A. In a Meselson-Stahl type experiment, bacterial cells grown in15N medium for many generations were washed and then allowed togrow in 14N medium. DNA was extracted just after transfer (0generation) and then after 1 and 2 generations. All these sampleswere analyzed by CsCl gradient centrifugation. From DNA isolatedfrom generations 0, 1 and 2 show.
B.Position of bands in the centrifuge tubes
C. 14N and 15N labelled DNA strands
Answer both questions for each mode of replication, conservativeand dispersive mode of replication.
